Imagesource: https://hackaday.io/JoelBasel

Building your own UART Receiver is one thing. Building an UART receiver without any ICs, but only using self-made logic gates based on transistors, is quite an achievement.

Considering that the creator behind this project - Joël de Kanter with a profile at hackaday.io - did exactly that as a school project, one can only show respect. 👏

Unfortunately the documentation is only available in German, but it can of course easily be translated into other languages. It's not like we lack the tools for that today.

Joël writes, that he actually wanted to build a CPU, but it was too complicated ... quite a pity, because I am sure that he would not only have made it. The project would have been a wonderful experiment and a great lecture for sure.